For the GE LM2500 gas turbine shown in the illustration, the 9th stage bleed air is used for which of the following? Illustration GT-0017
• Carefully trace the 9th Stage Bleed line on the GT-0017 diagram and note exactly where that labeled flow ends up. • Distinguish between 9th Stage Bleed and 9th Stage Cooling and 8th Stage Bleed – each goes to a different function on the same drawing. • Relate each answer choice to the labeled destinations on the diagram: cooling flows vs sump pressurization vs balance piston functions.
• On the illustration, where does the arrow labeled 9th Stage Bleed actually terminate, and what text box is it pointing to? • Which answer choices clearly correspond to other labels on the diagram (for example, functions tied to the 8th stage or to cooling), allowing you to rule them out for the 9th stage bleed? • How does the function you see at the end of the 9th stage bleed line differ from the function of the 9th stage cooling line lower on the drawing?
• Verify you are following the correct labeled line: it must say exactly 9th Stage Bleed, not 8th stage or 9th stage cooling. • Confirm the destination label of that line matches one, and only one, of the answer choices in wording or meaning. • Before choosing, double‑check that no other stage’s bleed (8th, 13th, 16th) is being confused with the 9th stage bleed in the upper part of the diagram.
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